RE : Should this work: (|(sn=hughes)) ?

["John Hughes" <john@Calva.COM>]

So what's happening is this:

I don't have any indexes yet, so when substring_candidates or
equality_candidates call bdb_index_param they get back an
error (see later).

when substring_candidates gets the error it returns 0.

when equality_candidates gets an error it returns rc,
so bdb_list_candidates doesn't call bdb_idl_union to
merge the ids in with the current set, which is zeroed at
the start.

approx_candidates also returns "rc" on error.